Question: what was the name of Dorethea Lange's spouse in the year 1920?
Paraphrase: Who was Dorethea Lange married to in 1920?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q230673 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1920')) }